I suggest you keep your hands in your pockets for this one. German researchers at the Institute of Robotics and Mechatronics have recently studied injuries caused by robots using sharp tools working alongside humans, BBC News reports.

Some of the test cases led to what would be considered lethal injuries, the report said. The idea behind the study was to gather data in order to learn how to develop safer robots that could aid humans in domestic settings–and probably on a much more significant level than what we’re used to today.